CVE-2009-4495

Exp

Yaws 1.85 writes data to a log file without sanitizing non-printable characters, which might allow remote attackers to modify a window's title, or possibly execute arbitrary commands or overwrite files, via an HTTP request containing an escape sequence for a terminal emulator.

Published: 2010-01-13 Last update: 2026-06-16 Assigner: [email protected] Source: [email protected]
NVD Status：Modified，CVE State: published
View at NVD, CVE.org, EUVD

CVE-2009-4495 is rated High Exploit Risk (73.1/100): CVSS Medium severity, with high exploitation likelihood (EPSS 8.95%, 95th percentile). 3 public exploit reference(s) are indexed (Exploit-DB). EPSS rose +5.38% over the last day, indicating growing attacker interest. Public exploits are available—assess exposure, apply mitigations, and prioritize patching.

Risk is dynamic; we continuously reassess and refresh what is shown on this page as upstream context changes.

Public exploit references (Exploit-DB) for CVE-2009-4495

EDB-ID Source Kind Published Link
33502 exploit_db edb 2010-01-11 Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗
— nvd_ref exploit_tag Exploit-DB ↗

Exploit prediction scoring system (EPSS) score for CVE-2009-4495

EPSS lead: Daily EPSS estimates relative likelihood of exploitation; percentile ranks this CVE among scored vulnerabilities (higher = more severe relative rank).

# Date Old EPSS score New EPSS score Delta (New - Old)
1 2026-06-15 3.57% 8.95% +5.38%
2 2026-06-11 4.21% 3.57% -0.64%
3 2026-05-22 — 4.21% —

Full EPSS history (16 records total)

Common vulnerability scoring system (CVSS) metrics for CVE-2009-4495

CVSS metrics for this CVE.

Base score Version Severity Vector Exploitability Impact Score source
5.0 2.0 MEDIUM
AV:N/AC:L/Au:N/C:P/I:N/A:N Click to expand
Access vector (AV:N)
Can be exploited remotely over network reachability.
Access complexity (AC:L)
Exploitation conditions are straightforward and predictable.
Authentication (AU:N)
No authentication is required.
Confidentiality impact (C:P)
Partial confidentiality impact.
Integrity impact (I:N)
No integrity impact.
Availability impact (A:N)
No availability impact.
 10.0 2.9 [email protected]

Weakness enumeration for CVE-2009-4495

OS Trackers for CVE-2009-4495

vendor priority summary link
debian unimportant CVE-2009-4495 unimportant priority: Debian including 1 source packages (yaws), 5 status rows across 5 suites (bookworm, bullseye, forky, sid, trixie): open 5. https://security-tracker.debian.org/tracker/CVE-2009-4495
ubuntu negligible CVE-2009-4495 negligible priority: Ubuntu including 1 source packages (yaws), 38 status rows across 38 suites (artful, bionic, cosmic, dapper, disco, eoan, focal, groovy, hardy, hirsute, impish, intrepid, jammy, jaunty, karmic, kinetic, lucid, lunar, mantic, maverick, natty, noble, oneiric, oracular, plucky, precise, quantal, questing, raring, saucy, trusty, upstream, utopic, vivid, wily, xenial, yakkety, zesty): ignored 30 (4 distinct statuses). https://ubuntu.com/security/CVE-2009-4495

Affected software / configurations for CVE-2009-4495

Vendor Product Version Raw CPE
yaws yaws 1.85 cpe:2.3:a:yaws:yaws:1.85:*:*:*:*:*:*:*

References for CVE-2009-4495

cvelogic Threat Intelligence